The utility model discloses an X-ray inspecting system. The X-ray inspecting system comprises an X-ray emitting device, a detector array and an X-ray beam intensity monitoring device, wherein X-ray beams emitted by the X-ray emitting device comprise work beams illuminated on the detector array and redundant beams illuminated outside the detector array; the X-ray beam intensity monitoring device comprises intensity detecting modules and a data processing module, wherein the intensity detecting modules are arranged between the X-ray emitting device and the detector array so as to receive the illumination of the redundant beams and send out detection signals, and the data processing module and the intensity detecting modules are coupled so as to receive the detection signals and output X-ray beam intensity monitoring signals. The intensity detecting modules of the X-ray inspecting system utilize redundant beams of X-ray beams, and are basically free from the influence of the X-ray emitting device and inspected objects, so that the monitoring result of the X-ray beam intensity is more accurate and reliable.